Integrated pump guard and control interlock

Patent metadata

Field	Value
Publication number	US-2023213029-A1
Application number	US-202318181728-A
Country	US
Kind code	A1
Filing date	Mar 10, 2023
Priority date	Jan 12, 2016
Publication date	Jul 6, 2023
Grant date	—

Abstract

A paint sprayer includes an end bell, a motor connected to the end bell, a pump drive connected to the end bell, a pair of protrusions attached to an extending from the end bell such that each protrusion is cantilevered from the end bell, and a pump assembly comprising a pair of mounting holes and containing a piston. The pair of mounting holes is adapted to receive and slide onto the pair of protrusions to mount the pump assembly on the end bell as well as slide off of the pair of protrusions to remove the pump assembly from the end bell. The pump drive is configured to covert rotational motion output by the motor to reciprocal motion. The pump assembly is configured to pump paint when reciprocated by the pump drive while mounted on the end bell.

First claim

1 . A paint sprayer comprising:
a support frame; a motor connected to the support frame, the motor electric; a pump drive connected to the support frame and configured to covert rotational motion output by the motor to reciprocal motion; a cover connected to the support frame, wherein the pump drive is disposed between the cover and the support frame; a door attached to the cover or the support frame, wherein the door is positioned within an opening that extends through the cover, and wherein the door is moveable between a closed position and an open position; a pump assembly removably mounted on the support frame, the pump assembly comprising
a housing;
a piston coupled to the pump drive and configured to reciprocate within the housing to pump paint;
an outlet;
a pressure sensor positioned to sense a pressure produced by the piston;
a prime control;
a pressure control configured to output a signal that is used to regulate operation of the motor based on output by the pressure sensor, the pressure control comprising a rotatable knob for user input of a pressure setting; and
one or more insulated wires that run from the pressure control along the housing, wherein the pressure control transmits the signal through the one or more insulated wires; and
a mounting interface comprising a pair of holes that respectively receive a pair of protrusions, the pair of mounting holes located on one of the support frame or the housing and the pair of protrusions located on the other of the support frame or the housing, the pair of mounting holes located on opposite sides of the piston at least when the pump assembly is mounted to the support frame; wherein the pump assembly is removeable through the opening, together with the housing, the piston, the pressure sensor, the prime control, the outlet, and the pressure control as a single assembly, from the support frame of the paint sprayer while the door is in the open position and the pump drive and the cover remain connected to the support frame by sliding the plurality of protrusions out from the plurality of holes.

2 . The paint sprayer of claim 1 , wherein the pair of mounting holes is formed by the housing and extends through the housing.

3 . The paint sprayer of claim 2 , wherein the pair of protrusions extend from a first side of the support frame opposite a second side, and wherein the motor connects to the second side of the support frame and extends from the second side of the support frame.

4 . The paint sprayer of claim 3 , wherein the pair of protrusions are parallel.

5 . The paint sprayer of claim 4 , wherein the pair of protrusions extend perpendicularly to a longitudinal dimension of the piston.

6 . The paint sprayer of claim 1 , wherein the pump assembly comprises a collar joined to the piston, and wherein the pump drive comprises a coupler that includes an open end facing outward away from the support frame, and wherein the open end of the coupler receives the collar.

7 . The paint sprayer of claim 1 , wherein the cover is removable, and wherein the pump drive is accessible with the cover removed.

8 . The paint sprayer of claim 1 , wherein the pump assembly is partially contained between the cover and the support frame when mounted on the support frame and protrudes out from the cover.

9 . The paint sprayer of claim 1 , further comprising an electrical connector electrically connecting the pressure control to the motor.

10 . The paint sprayer of claim 9 , wherein mounting the pump assembly onto the support frame electrically connects the pressure control to the motor at the electrical connector.

11 . The paint sprayer of claim 9 , wherein the electrical connector includes, in separate interfacing parts, a first part and a second part affixed to the pump assembly and configured to mate with the first part.

12 . The paint sprayer of claim 11 , wherein the first part includes a plurality of recesses adapted to receive a plurality of protrusions extending from the second part.

13 . The paint sprayer of claim 12 , wherein the first part overlaps the second part when the first part receives the second part to create an elongated seal.

14 . The paint sprayer of claim 13 , wherein disengagement of the first part from the second part disconnects an electrical connection between the pump assembly and the motor, and wherein engagement of the first part with the second part connects the electrical connection between the pump assembly and the motor.

15 . The paint sprayer of claim 14 , wherein the electrical connector includes an insulator affixed to one of the first part and the second part that encapsulates a portion of the electrical connector when the first and second parts are engaged.

16 . The paint sprayer of claim 1 , wherein engaging portions of the cover and the door guide movement of the door between the open position and the closed position, and wherein the door blocks the pump assembly from sliding the plurality of protrusions out from the plurality of holes while the door is in the closed position.

17 . The paint sprayer of claim 16 , wherein the door moves from the closed position to the open position by sequential linear slide then pivot motions, and the door moves from the open position to the closed position by sequential pivot then linear slide motions.

18 . The paint sprayer of claim 1 , further comprising:
a cable support protruding from an interior surface of the door, wherein the cable support is contoured and supports the one or more wires of the pump assembly with respect to the door.

Assignees

• Graco Minnesota Inc

Inventors

• Carideo Max
• Dalton James M
• Johnston Justin G
• Wrobel Steve J
• Lins Christopher A

Classifications

• B05B9/007 Primary

  At least a part of the apparatus, e.g. a container, being provided with means, e.g. wheels, for allowing its displacement relative to the ground · CPC title

• B05B9/0413 Primary

  with reciprocating pumps, e.g. membrane pump, piston pump, bellow pump (B05B9/0409 takes precedence) · CPC title

• B05B15/52

  for removal of clogging particles · CPC title

• F04B49/022 Primary

  by means of pressure · CPC title

• F04B15/02

  the fluids being viscous or non-homogeneous · CPC title